In traditional heating methods, heat is carried out through convection, conduction, and radiation, penetrating from the outside to the inside. However, under vacuum conditions, heat transfer through air convection is difficult. Only by relying on heat conduction and radiation can the material be provided with thermal energy. The surface temperature of the heated material is high, the internal temperature is low, and the temperature difference between the inside and outside is large, making it difficult to control the temperature. So, conventionalvacuum dryingThe method has slow heat conduction speed, high energy consumption, low efficiency, and long drying time.
Microwave heating is a type of radiation heating in which microwaves directly act on objects, heating both inside and outside without the need for convection or conduction to transfer heat. Therefore, it has fast heating speed, high thermal efficiency, short processing time, uniform temperature inside and outside the material, saving energy, high drying efficiency, and good drying quality. Intelligent static microwave vacuum drying equipment is a new type of microwave energy application device that combines microwave energy technology and vacuum technology, and is controlled by high-tech intelligent control. It combines the advantages of microwave drying and vacuum drying, while overcoming the disadvantages of high temperature, long time, and high energy consumption of conventional vacuum drying. In the general material drying process, the drying temperature is 30-60 degrees Celsius, which has the advantages of high drying yield, good quality, low processing cost, and can control moisture through an intelligent control system. In addition, when dried at low temperature and low pressure, the oxygen content is low, and the oxidation reaction of the dried material is weakened and slowed down, thereby ensuring the flavor, appearance, and color of the material. It is easy to dry heat sensitive materials, especially for low-temperature drying of traditional Chinese medicine extract extracts, beef sauce, chemical raw materials, and agricultural products, which has its unique advantages.